Engine Process

ABSTRACT

A pressure surface is propelled within an engine chamber. Air is introduced into the chamber. The air in the chamber is compressed with the pressure surface. The compressed air is charged with fuel. The fuel is combusted to propel the pressure surface within the chamber. The air and the combusted fuel are exhausted from the chamber. A turbocharger is powered with the exhaust to compress air. The air compressed by the turbo charger is passed into the chamber to propel the pressure surface in the chamber.

BACKGROUND OF THE INVENTION

In the normal operation of a four cycle internal combustion engine, it is often considered that about one third of the heat energy is dissipated with the radiator, one third goes out the exhaust, and the remaining third is used to do the work. The two thirds of the heat not engaged in the working of the engine is wasted energy. Capturing this wasted energy and putting it to use in the working of the engine would increase the fuel efficiency of the engine.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is schematic view of a cylinder assembly upon which the present invention process operates.

FIGS. 2-9 are schematic views of a cylinder assembly representing various stages of the present invention improved engine process.

FIG. 10 is a flow chart illustrating a first embodiment of the present invention improved engine process.

FIG. 11 is a flow chart illustrating a second embodiment of the present invention improved engine process.

FIG. 12 is a flow chart illustrating one embodiment of alternative subsequent steps to the embodiment of the present invention improved engine process illustrated in FIG. 11.

FIG. 13 is a flow chart illustrating another embodiment of alternative subsequent steps to the embodiment of the present invention improved engine process illustrated in FIG. 11.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 illustrates a cylinder assembly 2 of an engine upon which the present invention engine process operates. Cylinder assembly 2 includes housing 4, intake port 6, intake valve 8, chamber 10, pressure surface 12, connecting rod 14, crankshaft 16, fuel injector 18, exhaust valve 20, exhaust port 22, turbocharger 24, throttle 26, waste gate 28, and a sensing and controlling systems (not shown).

Chamber 10 is the combustion chamber or engine cylinder where fuel is burned to produce a driving force acting on pressure surface 12. Pressure surface 12 is any pressure surface movable within chamber 10 in response to a driving force, such as fuel combustion.

Fuel injector 18 is any apparatus for introducing fuel into chamber 10. Fuel injector 18 may be, but need not be, a conventional fuel injector.

A piston is one example of a pressure surface 12. Movement of pressure surface 12 within chamber 10 translates through connecting rod 14 to rotate crankshaft 16, producing engine power.

Intake port 6 is the channel through which air, or any other oxygen source for the combustion process, is provided into chamber 10. Intake valve 8 controls the flow of air into chamber 10. Similarly, exhaust port 22 is the channel through which air and combusted fuel are exhausted from chamber 10. Exhaust valve 20 controls the flow of air and combusted fuel out of chamber 10.

Turbocharger 24 is any apparatus for using exhaust gases to produce compressed air or some other type of compressed gas. While shown as a single device, turbocharger may, alternatively be embodied in multiple device acting in concert to achieve the compression.

Throttle 26 is any device for reducing the output of turbocharger 24. Throttle 26 is useful for controlling the amount of air compressed by turbocharger 24. In a similar vein, waste gate 28 is any type of assembly for redirecting exhaust away from turbocharger 24 to control the output of turbocharger 24.

The sensing system is useful for determining the needs of throttle 26 and waste gate 28. The controlling system is useful for providing the control of throttle 26 and waste gate 28 in response to input from the sensing system.

FIGS. 2-9 illustrate cylinder assembly 2 at various stages of an engine process. Each of FIGS. 2-9 represents a stage in the process. This engine process is cyclical and continuous in nature. Once started, at least some of the steps in the process repeat cyclically during the operation of the engine.

The process of the present invention relates to the operation of pressure surface 12 within chamber 10. Crankshaft 16 and connecting rod 14 are included in the Figures to enhance understanding of the present invention, but are not necessary to the present invention. Additionally, while crankshaft 16 is shown rotating in a counterclockwise direction, the direction in which crankshaft 16 rotates is immaterial to the present invention.

FIG. 2 represents one stage in the cycle of the engine process. While shown as the first step, FIG. 2 is not necessarily the first step in the process, since the process is cyclical and may start at any stage.

In FIG. 2, air 30 is introduced into engine chamber 10. While air 30 is entering chamber 10, chamber 10 is enlarged by moving pressure surface 12. Intake valve 8 is open to allow air 30 to enter chamber 10. Exhaust valve 20 is closed to prevent air 30 from being exhausted at this stage.

FIG. 3 shows a stage where air 30 in chamber 10 is compressed. During this stage, pressure surface 12 is moved to reduce the size of chamber 10. Intake valve 8 is closed to prevent the escape of air 30 from chamber 10. Exhaust valve 20 is open at this stage, but closes at some point prior to the stage represented in FIG. 4.

Illustrated in FIG. 4 is the stage of the process whereby fuel 32 is injected into chamber 10. This stage is usually when pressure surface 12 is at or very near a position commonly called top dead center. Both intake valve 8 and exhaust valve 20 are closed to prevent the escape of air 30 from chamber 10.

Represented in FIG. 5 is the stage where gas from the combusted fuel 32 drives pressure surface 12 to increase the size of chamber 10. This stage is often referred to as a power stroke since expanding gas from the combustion of fuel 32 creates power which the engine translates into movement. Both intake valve 8 and exhaust valve 20 are closed to prevent the escape of air 30 and combusted fuel 34 from chamber 10.

FIG. 6 shows the stage where air 30 and the combusted fuel 34 are exhausted from chamber 10. The exhausted air 30 and combusted fuel 34 are commonly referred to together as exhaust 36. During this stage, exhaust 36 passes through turbocharger 24. In response, turbocharger 24 generates compressed air 38 (FIG. 7) for use in chamber 10. Intake valve 6 is closed to prevent exhaust 36 from entering intake port 6.

FIG. 7 shows one of the unique features of the present invention. Intake valve 8 is opened to allow compressed air 38 to be directed into chamber 10 to propel pressure surface 12 in chamber 10. As illustrated in this Figure, compressed air 38 drives pressure surface 12 down to produce rotational movement in crankshaft 16. Compressed air 38 drives pressure surface 12 for this entire downward stroke. This movement is a second power stroke since it creates power which the engine translates into movement. As the process cycles, this stage may take the place of the stage shown in FIG. 2. Exhaust valve 20 is closed to prevent compressed air 38 from being vented during this stage.

FIG. 8 illustrates the stage where a portion of the compressed air 38 is vented. A portion of the compressed air 38 is vented, by opening exhaust valve 20, in order to allow pressure surface 12 to return and again reduce the size of chamber 10. As it is vented, compressed air decompresses. Intake valve 8 is closed to prevent compressed air 38 from being vented into intake port 6.

In FIG. 9, the remainder of the compressed air 38 is recompressed. This recompression is similar to the compression shown in FIG. 3 and may take the place of the compression shown in FIG. 3 as the process cycles. Intake valve 8 and exhaust valve 20 are closed to prevent venting of compressed air 38.

FIGS. 10-13 are flow charts representing steps of embodiments of the present invention. Although the steps represented in FIGS. 10-13 are presented in a specific order, the present invention encompasses variations in the order of steps. Furthermore, additional steps may be executed between the steps illustrated in FIGS. 10-13 without departing from the scope of the present invention.

Air is introduced 40 in a chamber. In one embodiment, the chamber is an engine cylinder.

Air is compressed 42 in the chamber with a pressure surface. In one embodiment, the pressure surface includes a piston.

The compressed air is charged 44 with fuel. The fuel is combusted 46 to propel the pressure surface within the chamber. The air and the combusted fuel are exhausted 48 from the chamber. A turbocharger is powered 50 with the exhaust, to compress air. The compressed air is passed 52 into the chamber to propel the pressure surface in the chamber. A portion of the compressed air is vented 54 from the chamber. The remaining air in the chamber is compressed 56. The cycle then repeats by returning to step 44 to charge the air in the chamber with fuel.

FIG. 11 represents an alternate embodiment of the present invention engine process, wherein a plurality of pressure surfaces are driven within a plurality of engine chambers.

Air is introduced 58 into a first one of chambers. Air is compressed 60 in the first chamber with a first one of pressure surfaces. The compressed air is charged 62 with fuel. The fuel is combusted 64 to propel the first pressure surface within the first chamber. The air and the combusted fuel are exhausted 66 from the first chamber.

A turbocharger is powered 68, with the exhaust to compress air. The compressed air is passed 70 into a second one of chambers to propel a second one of pressure surfaces in the second chamber. A portion of the compressed air is vented 72 from the second chamber. The remaining air is compressed 74 in the second chamber.

In one embodiment, the cycle then repeats with the first and second chambers swapping function. That is the second chamber being charged with fuel which is combusted to produce exhaust, which drives a turbocharger to produce compressed air to propel the first surface in the first chamber. Again, the cycle repeats with the first and second chambers swapping function

FIG. 12 illustrates an alternative embodiment to the repeated swapping function of the first and second chambers. Air is introduced 76 into a third one of chambers. The air is compressed 78 in the third chamber with a third one of the pressure surfaces. The compressed air is charged 80 with fuel. The fuel is combusted 82 to propel the third pressure surface within the third chamber. The air and the combusted fuel are exhausted 84 from the third chamber. A turbocharger is powered 86 with the exhaust, to compress air. The compressed air is passed 88 into the second chamber to propel the second pressure surface in the second chamber. A portion of the compressed air is vented 90 from the second chamber. The remaining air is compressed 92 in the second chamber. The process can then repeat with the first and third chambers alternatively or in combination producing exhaust which powers a turbocharger to compress air which is passed into the second chamber to propel the second pressure surface in the second chamber.

FIG. 13 illustrates another embodiment. Air is introduced 94 into a third one of chambers. The air is compressed 96 in the third chamber with a third one of the pressure surfaces. The compressed air is charged 98 with fuel. The fuel is combusted 100 to propel the third pressure surface within the third chamber. The air and the combusted fuel are exhausted 102 from the third chamber. A turbocharger is powered 104 with the exhaust, to compress air. The compressed air is passed 106 into the first chamber to propel the first pressure surface in the first chamber. A portion of the compressed air is vented 108 from the first chamber. The remaining air is compressed 110 in the first chamber. This process may then repeat to form a cycle.

In yet another embodiment, any number of intervening chambers may be involved in the cycle between the third and the first chamber so that the chain of steps produces a cycle wherein the first pressure surface is propelled in the first chamber by air compressed as a result of the exhaust of another chamber. This process may then repeat to form a cycle.

The foregoing description is only illustrative of the invention. Various alternatives, modifications, and variances can be devised by those skilled in the art without departing from the invention. Accordingly, the present invention embraces all such alternatives, modifications, and variances that fall within the scope of the described invention. 

1. A method for driving a pressure surface within an engine chamber, the method comprising: introducing air into the chamber; compressing the air in the chamber with the pressure surface; charging the compressed air with fuel; combusting the fuel to propel the pressure surface within the chamber; exhausting the air and the combusted fuel from the chamber; powering a turbocharger, with the exhaust, to compress air; and passing the air compressed by the turbocharger into the chamber to propel the pressure surface in the chamber.
 2. The method of claim 1 further including after propelling the pressure surface with the air compressed by the turbocharger, venting a portion of the compressed air from the chamber.
 3. The method of claim 2 further including after venting a portion of the compressed air from the chamber, compressing the remaining air in the chamber.
 4. The method of claim 1 wherein the chamber includes an engine cylinder and the pressure surface includes a piston.
 5. A method for driving a plurality of pressure surfaces within a plurality of engine chambers, the method comprising: introducing air into a first one of the chambers; compressing the air in the first chamber with a first one of the pressure surfaces; charging the compressed air with fuel; combusting the fuel to propel the first pressure surface within the first chamber; exhausting the air and the combusted fuel from the first chamber; powering a turbocharger, with the exhaust, to compress air; and passing the air compressed by the turbocharger into a second one of the chambers to propel a second one of the pressure surfaces in the second chamber.
 6. The method of claim 5 further including after propelling the second pressure surface with the air compressed by the turbocharger, venting a portion of the compressed air from the second chamber.
 7. The method of claim 6 further including after venting a portion of the compressed air from the second chamber, compressing the remaining air in the second chamber.
 8. The method of claim 5 wherein the chambers includes engine cylinders and the pressure surfaces includes pistons.
 9. The method of claim 5 further including: introducing air into a third one of the chambers; compressing the air in the third chamber with a third one of the pressure surfaces; charging the compressed air with fuel; combusting the fuel to propel the third pressure surface within the third chamber; exhausting the air and the combusted fuel from the third chamber; powering a turbocharger, with the exhaust, to compress air; and passing the air compressed by the turbocharger into the second chamber to propel the second pressure surface in the second chamber.
 10. The method of claim 5 further including: introducing air into a third one of the chambers; compressing the air in the third chamber with a third one of the pressure surfaces; charging the compressed air with fuel; combusting the fuel to propel the third pressure surface within the third chamber; exhausting the air and the combusted fuel from the third chamber; powering a turbocharger, with the exhaust, to compress air; and passing the air compressed by the turbocharger into the first chamber to propel the first pressure surface in the first chamber.
 11. A method for propelling a piston within an engine cylinder, the method comprising: introducing air into the cylinder; compressing the air in the cylinder with the piston; charging the compressed air with fuel; combusting the fuel to propel the piston within the cylinder; exhausting the air and the combusted fuel from the cylinder; powering a turbocharger, with the exhaust, to compress air; and passing the air compressed by the turbocharger into the cylinder to propel the piston in the cylinder.
 12. The method of claim 11 further including after propelling the piston with the air compressed by the turbocharger, venting a portion of the compressed air from the cylinder.
 13. The method of claim 12 further including after venting a portion of the compressed air from the cylinder, compressing the remaining air in the cylinder. 